Can you believe it has been 21 years since Mrs Doubtfire arrived in UK cinemas?

That's right, the charming story of a man who cross dresses as an elderly Scottish woman to become the nanny of his children because he's denied custody is old enough to buy alcohol in America, or legally adopt a child in the UK.

With the 2015 Sundance Film Festival kicking off in Utah this week, get set for a barrage of great (and not-so-great) films set to hit our screens in upcoming months.

You've all seen, or at least heard about, the likes of Supersize Me, Bowling For Columbine and An Inconvenient Truth, but there are many great documentaries that don't involve people gorging themselves on McDonald's, or Al Gore threatening us with global warming scare stories.

It's been 17 years since Titanic opened with people queueing around the block to see Leonardo DiCaprio and Kate Winslet's epic love story filled with icebergs, possessive fiancés and the musical stylings of Celine Dion.

When it comes to most classic films, you simply can't imagine anyone else but that actor playing the characters.

Tom Hanks as Forrest Gump, Harrison Ford as Han Solo or Keanu Reeves as Neo seem like those actors were in mind when the film was being thought up, yet those weren't the first choices for those roles.